Table I.

Mortality preventability classification

Classification	Criteria
Preventable	Anatomic injury or combination of injuries considered survivable
	Standard protocols not followed with unfavorable consequence
	Inappropriate provider care with unfavorable consequence
	P values >.5 by Trauma and Injury Severity Score methodology
Potentially preventable	Anatomic injury or combination of injuries considered severe but survivable
	Standard protocols not followed, possibly resulting in an unfavorable consequence
	Suboptimal provider care, possibly resulting in an unfavorable consequence
	P values .25–.5 by Trauma and Injury Severity Score methodology
Not preventable	Anatomic injury or combination of injuries considered nonsurvivable with optimal care
	Standard protocols followed, or if followed, did not result in an unfavorable consequence
	Appropriate provider care, or if suboptimal, did not result in an unfavorable consequence
	P values <.25 by Trauma and Injury Severity Score methodology

TRISS, Trauma and Injury Severity Score.